If you are flexible with your travel dates, always consider that you can buy extremely cheap train tickets if you avoid travelling in the weekends and if you choose to travel during the low season.
When travelling on such short distances, you can take into account also busses and carpooling options: with some luck you will find very cheap options, even if you book on short notice.
What are the departure and arrival stations in Castleknock and Tipperary?
The trains to Tipperary leave Castleknock from Castleknock and arrive in Tipperary.
How long will it take you from Castleknock to Tipperary by train and when do the trains leave?
With the fastest connections you will be in Tipperary in 3 hours and 13 minutes, but on average it takes 4 hours and 16 minutes. The first train headed to Tipperary is at 06:11, while the last one leaves Castleknock at 15:11.